byU.S. Department of Agriculture, Bureau of Dairy Industry, Extension Service, Division of Motion Pictures
Contents. The evolution of life and the fundamentals of mammalian reproduction, presented through animation, photomicrography, and natural photography. The commentator quotes William Harvey's statement that all animals have their origin in the single egg cell and views of several different animals illustrate this remark. Marching cadets, girls dressed in white marching in a religious procession, and men at work are shown as the commentator says, " all of mankind who have lived and labored...